The NIKON Plan 40x/0.65 ∞/0.17 Ph2 DL WD 0.57 Microscope Objective is a high-quality microscope attachment designed for biological laboratory use. With a magnification of 40x, this superior-grade objective from Nikon provides clear and detailed images for various scientific applications. The dry immersion feature allows for easy and precise focusing, making it an essential component for microscopy research and analysis in healthcare, lab, and industrial settings. This microscope objective is a reliable and durable option for those seeking accurate and reliable results in their microscopes.